LongevityMap Gene

Gene details

HGNC symbol

APOA4

Aliases

Common name

apolipoprotein A4

Description

Apoliprotein (apo) A-IV gene contains 3 exons separated by two introns. A sequence polymorphism has been identified in the 3'UTR of the third exon. The primary translation product is a 396-residue preprotein which after proteolytic processing is secreted its primary site of synthesis, the intestine, in association with chylomicron particles. Although its precise function is not known, apo A-IV is a potent activator of lecithin-cholesterol acyltransferase in vitro. [provided by RefSeq, Jul 2008]

The frequency of apoAIV alleles was not significantly different between Alzheimer patients and the elderly control group. However, in both groups, apoAIV (360:His) allele frequency was higher than in the general population.

Two restriction polymorphisms, HinfI347 (Thr347/Ser) and Fnu4HI360 (Gln360/His), and a VNTR (alleles 3, 4) at the 3 region of the APOA4 gene were examined in 71 centenarians (18 men and 53 women, 100-107 years of age, mean 102.3 years) and 100 unrelated adults (21 men and 79 women, 19-59 years of age, mean 35.7 years)

Conclusions

The Hinf347 genotype distribution was significantly different in centenarians